如何在Android WebView中删除标题？ （加载时） [英] How to remove the header in Android WebView? (While Loading)

问题描述

我想在android' WebView '中删除网站的标题。有了我的代码，它就有效。但问题是' WebView '在页面完全加载后删除了标题。我想删除它，而它正在加载。

I want to remove the header of the website in android 'WebView'. With the Code that I have, it works. But the problem is that the 'WebView' is removing the header after the page loaded completely. I want to remove it, while it is loading.

多数代码片段：

webView.setWebViewClient(new WebViewClient() {
            @Override
            public void onPageFinished(WebView view, String url)
            {
                webView.loadUrl("javascript:(function() { " +
                        "var head = document.getElementsByTagName('header')[0];"
                        + "head.parentNode.removeChild(head);" +
                        "})()");

                webView.loadUrl("javascript:(function() { " +
                        "var head = document.getElementsByTagName('footer')[0];"
                        + "head.parentNode.removeChild(head);" +
                        "})()");
            }
        });

推荐答案

最简单的方法是在<$ c $中注入Javascript c> onLoadResource（）方法。把它放在try-catch块中，因为 WebView 在加载之前不会知道该元素：

Easiest way is to inject Javascript in onLoadResource() method. Put it inside try-catch block since WebView will not know about the element before it has been loaded:

webView.setWebChromeClient(new WebChromeClient() {
           ...

            @Override
            public void onLoadResource(WebView view, String url) {

                try {
                    webView.loadUrl("javascript:(window.onload = function() { " +
                            "(elem1 = document.getElementById('id1')); elem.parentNode.removeChild(elem1); " +
                            "(elem2 = document.getElementById('id2')); elem2.parentNode.removeChild(elem2); " +
                            "})()");
                } catch (Exception e) {
                    e.printStackTrace();
                }

            }
}

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